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Monthly Historical Averages
Port Isabel, TX
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April
Average Temperature
High
25°
Feels 27
Low
21°
Feels 21
Average Precipitation
5 Days
Rain amount
31.5mm
Snow amount
0cm
Content continues below
Daily Historical Averages
April 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
27°
13
26°
14
26°
15
26°
16
26°
17
27°
18
27°
19
23°
20
25°
21
26°
22
27°
23
28°
24
30°
25
27°
26
25°
27
28
29
30
Forecast
Sunday, April 12, 2026
Day
27°
Feels 29
Wind
33 km/h SE
Gust
49 km/h
Humidity
74%
P.O.P
40%
Rain
<1 mm
Night
23°
Feels 24
Wind
30 km/h SE
Gust
44 km/h
Humidity
94%
P.O.P
40%
Rain
<1 mm
Historical Averages
Apr 12
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.